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Finding the Fourth Proportional to 561.05, 774.03 and 339.92

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Solution

The fourth proportional to 561.05, 774.03 and 339.92 is: 468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.05 : 774.03 = 339.92 : x
  2. Step 2: Convert to fraction form
    561.05/774.03 = 339.92/x
  3. Step 3: Cross multiply
    561.05x = 774.03 × 339.92
  4. Step 4: Simplify right side
    561.05x = 263,104.41
  5. Step 5: Solve for x
    x = 263,104.41/561.05
  6. Step 6: Final answer
    x = 468.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.